Mechanism for reversing engines.



No. 765,497. PATENTED JULY 19, 1904.

W. W. LEAGH.

MEGHANISM POR REVERSING ENGINES.

' APPLIGATION FILED JAN. 9, 1904.

N0 MODEL. 2 SHEETS-SHEET l.

No. 765,497. i PATBNTBD JULY 19, 1994. w. w. LBAGH.v

MEGHANISM vFOR REVERSING ENGINES. APPLICATION FILED M19. 9. 1909.

911ml@ 13 5w? 11m Patented .Iuiy 19, i904.

UNITED STATES PATENT OFFICE.

VILLIAM WV. LEACH, OF MANSFIELD, OHIO.

IVIECHANISNI FOR REVERSING ENGINES..

SPECIFICATION forming part of Letters Patent No. 765,497, dated July 19, 1904.

Application filed January 9, 1904.

T0 @ZZ whom t muy concern:

i Be it known that I, WILLIAM W. LEACH, a`

citizen of the United States of America, and a resident of Mansfield, county of Richland, and State of Ohio, have invented certain new and useful Improvements in Mechanism for Reversing Engines, of which the following is a specification.

My invention is designed to provide a means of reversing or changing the direction of the rotation of the crank-shaft of an engine. In affording facilities for reversing the rotation of engines it has been customary to transmit a reciprocating motion to the valve-rod through the medium of an eccentric,by means of which, in conjunction with suitable connecting means, motion is imparted to the valve-rod and valve.

In constructing' my device I obviate the necessity of using an eccentric to impart motion to the valve-rod.

rIhe objects of my improvements are to provide a mechanism that is equally balanced in its rotation and to afford a simple and eflicient means of reversing the engine. I attain these and other objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a perspective view of the disk, trunnion-collar, yoke, and slidable sleeve, showing my device as it appears looking at it at an angle from the rear of the crank. Fig. 2 is a top plan view of my device. 'Fig. 3 is a longitudinal cross-sectional view of my device. Fig. 4 is an end view of the trunnioncollar, showing its slotted portion which engages withthe driving means made integral with the sleeve and a similar slot on the opposite side, which is adapted to receive the body portion of the U-shaped link. Fig. 5 is an end view 'of my device looking toward tlie crank, having a portion of an adjustable washer broken away, showing the means for fitting the inner disk to the outer disk. Fig.

6 is a detail top plan view of the sleeve, showing the link connected to aprojecting portion made integral therewith. Fig. 7 is a view in side elevation of a bell-crank having a yoke formed on one end.

Reference-numeral 1 designates an ordinary crank-shaft having a crank 2, the shaft beingy Serial No. 188,341. (No model.)

lar 4, having trunnions 5 made integral therewith or secured to the periphery thereof, is fitted and rigidly attached to the crank-shaft, the outer end of the collar contacting with the face of the adjacent pillow-block, which, in connection with the hub of the crank, prevents lateral motion of the crank-shaft. Apertures are formed longitudinally through the trunnions and radially of the collai'4, in which apertures are received the pintles 8 8, the latter being removably held in place by means of the set-screws 50 50. These pintles project beyond tlie ends of the trunnions, their outer ends being received in apertures formed radially of an inner disk or annulus 9, the bore of which disk is recessed, as at 51 51, at diametrically*opposite points toreceive the trunnions 5 5 of the collar 4, the purpose of the trunnions being to afford a broad bearing-- sliding sleeve 13, mounted on the shaft and` adapted to reciprocate thereon. This sleeve is provided with an enlargement or abutment 14 at one end thereof, from which radially extends a bifurcated hanger 14', between the bifurcations ofl which is received and journaled one end of a U-sliaped link 15, the opposite end of the link being pivotally secured to the center of the annulus, which latter is recessed, as at 52, to receive the end of the link and permit it to have a certain amount of play. A split ring 16 is fitted on the sleeve between the enlargement 14 and lock-nut 57, the latter received upona threaded portion 58 and secured in vplace by means of a set-screw 58. The split ring is provided with trunnions 17. A suitable standard 18 is secured to the bed of the engine and has alsuitable aperture provided in the top thereof to receive a bolt 53, upon which is journaled a bell-crank having a yoke 19 formed on one end with suitable apertures provided therein to fit the trunnions 17, which are secured or made integral with the annular ring 16. The 'opposite end of the bell-crank is connected with any suitable lever, and when the lever is moved backward or forward a sliding or reciprocating motion is imparted to the sleeve 13, which by means of its connection through the medium of the link 15 with the annulus 9 with the inner disk, as herein before described, operates to tilt or swing the disk at an incline to the longitudinal aXis of the crank-shaft. A periphery of the inner disk, an outer disk 20, having a periphery L-shaped in cross-section, received upon the annulus 9, the circular inwardly-extending flange 54 of the disk, adapted to contact with one side of the annulus 9. A suitable aperture is provided in the center of the outer disk, adapted to iit over one of the laterallyextending shoulders 1() of the annulus. A washer 21, having a series of notches 22 provided in its outer face, is fitted over the opposite annular shoulder 10,- the outer periphery of the washer being screw-threaded and adapted to engage with the inner periphery of the outer disk, which is internally threaded near its edge, as shown, to receive the washer. By means of the outer disk and the washer described the annulus is securely incased and inclosed within the outer disk. The washer can be brought in contact with the annulus more or less to prevent lateral motion or play thereof. Itis held in its proper lplace and adjustment by means of the stop-plate 23, which is mounted upon a threaded stud 55, secured to a boss 24E, made integral with the outer disk. rlhe stop-plate 23 is adapted to lit in any one of the notches, preventing the rotation of the washer when it is properly adjusted.

It will be noted that the annulus rotates within the outer disk. Suitable trunnions 25 are made integral with the periphery of the outer disk and adapted to pivotally support a yoke 56, which is provided with suitable bearings 28 for the reception of the trunnions. A boss 29 is made integral with the upper portion of the yoke, the boss being received in a suitable aperture provided in a bracket 30, attached to the boiler, engine, or other suitable support. rlhe purpose of the bracket is to keep the yoke in proper relation tothe center or theaX is of the crank-shaft. An outwardly-extending arm 31 is made integral with the yoke and extends at right angles thereto, to the outer end of which arm is pivotally connected the valve-rod 32. The operation of my reversing mechanism is as follows:

When motion is imparted to the crank-shaft, an oscillatory movement is communicated, through the medium of the outer disk, to the yoke 56, causing the latter to swing longitudinally of the aXis of the crank-shaft, the projecting arm 31 of the yoke being oscillated at right angles therewith and being' pivotally connected to the valve-rod 32 communicates a reciprocating motion thereto. The travel of the valve-rod is regulated by the sliding sleeve 13, connected to the annulus, and by tilting the annulus more or less at an inclination to the axis of the crank-shaft, increasing vor decreasing, as the case may be, the wabbling or staggering motion of the annulus, which in turn increases or decreases the travel of the valve in conjunction with the connections described.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is i 1. The combination in a reversing' mechanism for valve, of a shaft,a collar secured thereto, trunnions projecting from the collar, an annulus surrounding the collar and provided with open slotsl for the reception of the trunnions, the annulus further provided with apertures communicating with the slots, pintles carried by the trunnions and received within the apertures in the annulus, trunnions on the ring, a yoke in which the outer ring is supported, and means connected with the annulus for swinging the latter on the pintles and trunnions of the collar.

2. The combination in a valve-reversing mechanism, of a shaft, a collar secured thereto and provided with pintle-apertures, pintles received in the apertures, fastening means for removably securing the pintles in position, an annulus surrounding the collar, the annulus provided with apertures for the reception of the outer ends ofthe pintles, an outer ring carried by the annulus, and means connected with the annulus for swinging the latter and the outer ring with respect to the collar.

3. The combination, in a valve-reversing mechanism, of a shaft, a collar rigidly secured thereto, an annulus pivotally mounted on the collar, an outer disk within which is received the annulus, a movable member mounted on the shaft,'means for moving the member at will, means connecting the movable member and the annulus for swinging the latter and the outer disk with relation to the shaft, the collar provided with a guide-slot and a guidelinger carried by the movable member and reciprocated in the slot.

4. A reversing valve mechanism comprising a shaft, a collar keyed thereto, an annulus pivotally connected with the collar, an outer disk carried by the annulus, means for retaining the outer disk stationary with respect to the rotary movement of the annulus, a movable member mounted on the shaft, the annulus provided with a recess, and a link, one end of which is pivotally secured to the movable member, the opposite end of the link received and pivotally held in the recess in the annulus.

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5. A- reversing valve mechanism comprising a shaft, an annulus pivotally and rotatably secured with relation to the shaft, a disk carried by the annulus, means for preventing the rotation of the disk with respect to the annulus, a rotatable locking-ring removably secured to one side of the disk, means carried by the disk for retaining the ring in adjusted position, and means connected with the annulus for rocking the latter with respect to the shaft. i

6. A reversing valve mechanism comprising a shaft, an annulus rotating and pivotally secured With relation to the shaft, lateral shoulders on the annulus, a disk surrounding the annulus, the disk being L-shaped in crossseotion, one edge of the disk resting upon one annular shoulder of the annulus, a closing and retaining means received upon the opposite side of the annulus and inclosing the opposite shoulder, the means removably secured to the diskand meansfor rocking the annulus with respect to the shaft.

7 A reversing valve mechanism comprising a shaft, an annulus rotatably and pivotally secured with relation toh the shaft, an outer disk or casing received upon the annulus, the casing provided With alocking-ring removably secured to the casing and provided with a series of recesses, a stop-plate removably secured to the casing, the stop-plate reoeivable in any one of the grooves in the locking-ring and means for swinging the annulus with respect to the shaft.

Signed at Mansfield, Ohio, this 24th day of November, 1903.

WILLIAM W. LEACH. Witnesses:

JOHN H. Goss,` EDITH CLINE. 

